A flow wrapper is an automated packaging system that surrounds products with a continuous flexible film. The machine forms a longitudinal seal and two end seals to create a closed package.
Because of its shape, the finished package is commonly known as a pillow pack.
Rather than relying on repeated manual wrapping, flow wrapping machinery supports a continuous packaging process. This makes the equipment suitable for production lines that require fast and consistent packaging.
How Do Flow Wrapping Machines Work?
A flow wrapping machine uses a continuous roll of flexible film to produce repeatable sealed packs.
1. Products Enter the Machine
Products are carried into the machine by a conveyor or integrated feeding system.
2. The Film Is Formed Around the Product
The packaging film is shaped around each product as it moves through the machine.
3. The Length Seal Is Formed
The film is sealed along its length to create a continuous tube around the product.
4. Cross Sealing and Cutting
End-sealing jaws close the package before cutting it into an individual pack.
5. Finished Product
Once sealed and cut, the finished pack moves out of the machine ready for handling, delivery or sale.
What Are the Benefits of Flow Wrapping Machines?
Flow wrapping equipment can help manufacturers improve output and produce consistent packs.
Increased Production Rates
Depending on the machine model and product dimensions, a flow wrapper may package several thousand items each hour.
Repeatable Pack Presentation
The machine applies consistent seals and pack formatting to every item. This can help produce a consistent presentation across a production run.
Less Manual Handling
An automated system reduces hands-on work throughout the wrapping process. Staff can therefore spend less time on repetitive packaging work.
A Protective Film Barrier
A closed flow-wrapped pack provides protection from dust, damp conditions, contamination and physical contact during distribution and storage.
Packaging for Different Products
The equipment can be configured for varied product formats and packaging materials.
What Can Be Packaged Using a Flow Wrapper?
The process can package products from several different sectors.
Products frequently packaged in this way include:
- Biscuits
- Cakes, bread products and other bakery goods
- Chocolate and confectionery
- Fruit and vegetables
- Frozen foods
- Medical products and devices
- Pharmaceutical products
- Cosmetics and personal care items
- Domestic and consumer products
- Hardware components
Because it can package both food and non-food goods, flow wrapping is widely used across manufacturing industries.
Flow Wrapping Film Options
The correct flexible film will depend on the item being packed and the conditions it must withstand.
Frequently used films include:
- Biaxially oriented polypropylene film flow wrapping machines
- Polyolefin film
- Polyethylene film
- Polyethylene terephthalate film
Film selection should take account of the item, shelf-life needs, pack appearance and operating conditions.
When Should You Invest in a Flow Wrapping Machine?
An automatic flow wrapper may become suitable when manual processes start slowing the production line.
You may benefit from upgrading when:
- Your required packaging output is rising
- Hand wrapping creates a production bottleneck
- Pack appearance or seal quality is inconsistent
- Greater consistency is required
- Labour costs are increasing
Automation may provide steadier production without reducing packaging consistency.
Key Flow Wrapper Features
The correct machine should be chosen according to the product and production requirements.
Useful machine features include:
- Maximum production speed
- Supported product dimensions
- Fast and straightforward changeovers
- Photocell registration for printed films
- Integrated date or batch coding
- Compatibility with automatic feeding systems
- Clear operator controls
- Consistent and dependable seals
Your product range, packaging volume and projected demand should guide the final machine specification.
What Is the Difference Between Flow Wrapping and Shrink Wrapping?
Although both methods use flexible film, the packaging processes are different.
A flow wrapper creates a closed pillow-shaped pack using continuous film.
Shrink wrapping places film around the item and then uses heat to contract it closely around the outside.
The choice will depend on the desired pack format, the product and how it will be stored or transported.
Can a Flow Wrapper Integrate with Existing Equipment?
Yes. Current flow wrappers may be installed as part of an established production system.
Integration options commonly include automatic product feeders, conveyors and label applicators. This allows manufacturers to add automated packaging without making major changes to the full production line.
Flow Wrapping Machinery from Kempner
Kempner UK has more than 50 years of experience supplying packaging machinery and materials throughout the UK.
Its range includes horizontal and vertical flow wrapping systems for food and non-food products.
Machines can be supplied with printed-film registration, optional coding systems and tailored configurations.
The company offers installation, start-up support, servicing and continued technical help. These services can help businesses keep equipment operating consistently.
Questions About Flow Wrapping Machinery
What Is a Flow Wrapping Machine Used For?
A flow wrapping machine creates sealed film packs around individual items. These packs can help shield items while they are stored, delivered or presented for sale.
Can Food Be Packaged with a Flow Wrapper?
Yes, they are. Flow wrapping is widely used for bakery goods, confectionery, snacks and fresh produce. It provides a hygienic sealed pack.
Can a Flow Wrapper Be Used for Manufactured Goods?
Yes, they can. Manufacturers use flow wrapping machinery for pharmaceutical products, medical devices, hardware, cosmetics and consumer goods.
What Is the Speed of a Flow Wrapping Machine?
Packaging speed is affected by the equipment model, pack format and item being handled. Many high-performance machines can produce several thousand sealed packs in an hour.